Is coolant evident in the oil?
Yes | REFER to: appropriate Engine article. |
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No | GO to B8 |
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NOTE: Use UView® Combustion Leak Tester part number UVU560000-R or equivalent.
Using a cooling system combustion gas leak tester, following the instructions supplied with the tester, check the coolant for combustion gases.
B8 CHECK THE COOLING SYSTEM FOR COMBUSTION GASES
Are combustion gases present?
Yes | REFER to: appropriate Engine article. |
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No | GO to B9 |
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B9 CHECK COOLANT CONDITION
Check the coolant for dirt, rust or contamination and check the coolant concentration.
Is the coolant condition OK?
Yes | GO to B10 |
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No | FLUSH the engine cooling system. REFER to: Cooling System Flushing . |
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B10 CHECK THE ELECTRIC COOLING FAN OPERATION
Start the engine.
Place the climate control function selector in the MAX A/C position and the blower motor switch in the HI position.
Did the electric cooling fan operate?
Yes | GO to B11 |
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No | DIAGNOSE the electric cooling fan operation. Refer to ENGINE CONTROLS - SYMPTOM CHARTS (EXCEPT DIESEL & HYBRID) . |
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Original technical text and illustrations, formatted as HTML. Follow the engine, transmission, equipment, model and year specified in the source. Import and layout checks do not establish applicability to every 2015–2017 Mustang. About this collection.